Cylinder flow

Impulsively started flow around a circle at Reynolds number Re = 140 with development of the instability and transition to Von Karman vortices. The large picture below shows the overall Von Karman street at the end of the computation.


  • The numerical method employed in the simulations was described in P. Deglaire, S. Engblom, O. Ågren, H. Bernhoff: Analytical solutions for a single blade in vertical axis turbine motion in two-dimensions, in Eur. J. Mech. B Fluids 28(4):506--520, 2009: (doi).
  • The fast multipole method was further detailed in S. Engblom: On well-separated sets and fast multipole methods, in Appl. Numer. Math. 61(10):1096--1102, 2011: (doi).

  • Flow
    Stefan Engblom
    Last modified: Thu May 10 11:04:19 MEST 2013